<!doctype html>
<html>
	<head>
		<title>Margin collapse</title>
		<link href="/assets/reset.css" rel="stylesheet">
		<link href="setup.css" rel="stylesheet">
		<link href="style.css" rel="stylesheet">
	</head>
	<body>
		<section>
			<p>This is some text in the first element.</p>
			<p>There can be multiple elements within it, maybe even that wrap to multiple lines.</p>
		</section>
		<section>
			<p>And some more in the second element.</p>
		</section>
		<section>
			<p>Then a third one, too.</p>
		</section>
	</body>
</html>
index.html
			/* Same as before. */
body {
	font-family: sans-serif;
	padding: 20px;
}

section {
	border-top: solid black 4px;
	padding: 10px;
}

section:nth-child(1) { background-color: deepskyblue; }
section:nth-child(2) { background-color: gold; }
section:nth-child(3) { background-color: tomato; }
setup.css
			/* Lower two, again. */
section:not(:first-child) { margin-top: 40px; }

/* On the bottom of the first one. */
section:first-child { margin-bottom: 60px; }
style.css